Founder of oil and gas equipment distributor KS Energy Services. Recently stepped down as chairman after selling bulk of family holdings to Indonesian tycoon Kris Wiluan for $115 million. Remains a special adviser and, with 5 family members, a significant shareholder.

To compile this list we looked at shareholdings in publicly traded companies as well as in private company filings. For people with publicly traded fortunes net worths were calculated using current share prices and exchange rates. For privately held fortunes we estimated what they would be worth if public.

Stock quotes are delayed at least 15 minutes for Nasdaq, at least 20 minutes for NYSE/AMEX.
U.S. indexes are delayed at least 15 minutes with the exception of Nasdaq, Dow Jones Industrial Average and S&P 500 which are 2 minutes delayed.